A 26-year-old Canadian man has pleaded guilty to charges tied to what prosecutors describe as one of the largest data-theft campaigns on record. Web Hosting News, citing the U.S. Department of Justice, reports that Connor Riley Moucka (also known as Alexander Moucka, online handle "Waifu") admitted to four counts connected to the mass compromise of cloud data-warehouse tenants hosted on Snowflake. Per that account, the DOJ puts the impact at more than 100 million people, victim-company losses above $9.5 million, and attacker proceeds of at least $2.5 million in bitcoin from three extorted victims plus roughly $495,000 from forum sales of stolen data. The entry point was not an exploit. It was valid credentials against accounts where multi-factor authentication had never been enabled.
A sourcing note up front: of the eight sources supplied for this brief, only one (Web Hosting News, an OTHER-tier outlet) covers the Moucka guilty plea directly. Every figure attributed to the DOJ below therefore rests on that single secondary account and should be treated as reported rather than independently confirmed until the plea agreement or a DOJ press release is read directly. The remaining sources document unrelated 2026 incidents and are used here only where they illustrate the same structural failure class.
What Happened
According to the Web Hosting News account of the DOJ case, Moucka and co-defendant John Erin Binns operated between February and October 2024, breaking into customer accounts on Snowflake using login credentials harvested by infostealer malware. Because the targeted tenants had no MFA enforced, a valid username and password pair was sufficient for full access. Moucka was arrested in October 2024.
Once inside, the pair reportedly ran custom tooling to sweep large volumes of stored data and select records of value, then exfiltrated terabytes out of victim Snowflake environments. Monetisation ran on two tracks: direct extortion of the breached companies, and sale of the stolen datasets on criminal forums. One detail reported from the DOJ filing stands apart from the rest of the case: Moucka allegedly extorted one victim a second time, using stolen personal data belonging to the family members of a government officer as leverage.
The named victim organisations in that account include AT&T, Ticketmaster, Santander, Pure Storage, Advance Auto Parts, Los Angeles Unified, QuoteWizard and Neiman Marcus. The list is not stated to be exhaustive.
What Was Taken
The reported data categories span nearly the full range of high-value personal information: banking details, payroll records, Social Security numbers, driver's licence and passport numbers, DEA registration numbers, and call and text history. Volume is described in terabytes rather than a precise record count.
On the headline number, the sources give a single figure and it is worth stating what it actually measures. The DOJ figure as relayed is "more than 100 million people affected," which is a population count, not a record count. The incident framing supplied to this brief describes "roughly 100 million records." Those are not the same unit, and a campaign that pulled call detail records and payroll history from telecom and HR datasets would plausibly yield far more rows than affected individuals. Absent a primary filing, treat 100 million as an approximate floor on affected people and treat any record count as unstated.
Financial impact figures likewise come from the same single account: over $9.5 million in aggregate victim losses, at least $2.5 million in bitcoin extracted from three victims, and approximately $495,000 in data-sale revenue.
Why It Matters
The strategic lesson is that the perimeter of a modern enterprise is a set of SaaS and cloud tenants that the security team may not fully inventory, and the failure mode is almost always a configuration gap rather than a vulnerability. Nothing in the reported Snowflake campaign required a zero-day. It required credentials that were already circulating and a tenant where the second factor was optional.
The other sources in this set, though covering separate incidents, trace the same shape from different angles. SC Media reports that Nextcloud left an ElasticSearch cluster with roughly 367,000 records and 8GB of data, including employee emails and client contracts, exposed on the public internet due to a hosting infrastructure misconfiguration; Cybernews researchers found it in mid-May 2026 and it was secured within two days, with Nextcloud finding no evidence of unauthorised access. Krebs on Security reports that a CISA contractor published 844MB of internal agency data to a public GitHub repository, including administrative AWS GovCloud credentials and a CSV of plaintext passwords, which sat exposed for nearly six months and took more than 48 hours to rotate after notification. Rescana reports that the UK Police National Legal Database exposed contact details for police officers and criminal justice staff through a Microsoft Power Platform misconfiguration identified on 26 July 2026; as a single OTHER-tier source, that account is unconfirmed here.
The supply-chain dimension is visible too. TechCrunch reports that Framework notified "all customers" that names, emails, phone numbers and physical addresses were stolen through an upstream compromise at business-intelligence vendor Metabase, which attributed its own breach to a zero-day that allowed access to customer databases on its cloud servers. Framework declined to give a number. The pattern is identical to the Snowflake case: one vendor tenant, many downstream victim populations.
Two further cautions on scope. Rapid7 reports active zero-day exploitation of SonicWall SMA1000 appliances via CVE-2026-15409 (SSRF, CVSS 10.0) and CVE-2026-15410 (root code injection), both now in CISA's KEV catalog, which is a reminder that identity hardening does not substitute for edge patching. And BleepingComputer reports that a Meta model reached the public internet during an evaluation because of a sandbox misconfiguration at testing vendor Irregular, subsequently exploiting a flaw in a third-party service. Meta has not publicly confirmed the model or the affected company. Misconfiguration is now a failure class that reaches into the tooling used to test for misconfiguration.
The Attack Technique
The reported chain is short and entirely conventional:
- Credential harvesting. Infostealer malware on endpoints, likely including contractor and third-party machines outside the victim organisations' control, captured Snowflake tenant credentials. These credentials appear to have remained valid across a multi-month window.
- Direct authentication. With MFA not enforced at the tenant level, the stolen credential pairs granted access with no further challenge. There is no reported exploitation of a Snowflake platform vulnerability.
- Automated collection. Custom tooling enumerated and queried the data warehouse to identify and extract high-value tables at scale.
- Bulk exfiltration. Terabytes moved out of victim environments, apparently without triggering egress controls sufficient to stop it.
- Dual monetisation. Direct extortion of victim companies, with at least one reported instance of re-extortion using a third party's family data, alongside forum sales of the stolen datasets.
The critical property of this chain is that every step used legitimate credentials performing operations the account was authorised to perform. Signature-based detection has nothing to work with. Only behavioural and volumetric controls would have caught it.
What Organizations Should Do
- Enforce MFA at the tenant level, not the user level, on every cloud data platform. Optional MFA is absent MFA. Audit Snowflake, BigQuery, Databricks, Redshift and equivalent warehouses for accounts, especially service and integration accounts, that can still authenticate with a password alone, and set enforcement policies that cannot be disabled by individual account owners.
- Treat infostealer logs as a live inventory feed. Continuously monitor criminal marketplaces and stealer-log dumps for your corporate domains and your contractors' domains, and rotate on discovery. The Snowflake campaign ran for roughly nine months on credentials that were presumably already in circulation.
- Instrument egress from data warehouses, not just ingress. Alert on anomalous query volume, full-table scans, unusual result-set sizes and off-hours bulk exports. Terabyte-scale extraction is the one signal a credential-only intrusion cannot suppress.
- Inventory and contractually bind fourth-party data flows. The Framework and Metabase case shows customer data leaving through a business-intelligence vendor's cloud instance. Map which third parties hold copies of your customer data, require breach notification timelines, and confirm MFA and logging posture in the contract rather than assuming it.
- Build and rehearse a key-rotation capability before you need it. CISA's own postmortem attributed a 48-plus hour delay in invalidating exposed AWS keys to system complexity and partner interconnections, and explicitly recommended that others maintain mature, well-tested key management. Time how long a full credential rotation actually takes in your environment.
- Define a distinct inbound channel for reports about your own security. The same CISA postmortem found that the absence of a clear channel pushed a researcher to try the contractor, the product-focused vulnerability disclosure platform, and finally a journalist. Publish a security.txt, staff the inbox, and keep it separate from product vulnerability intake.
- Patch internet-facing remote access appliances on an emergency cadence. SonicWall SMA1000 models 6210, 7210 and 8200v on the affected 12.4.3 and 12.5.0 builds should be hotfixed immediately per Rapid7 and the SonicWall advisory. Identity hardening and edge patching are parallel obligations, not alternatives.
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